US4846855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for adsorption treatment of gas
Assignee: Toyobo Co Ltd
•
Filing: 1988-03-25
•
Granted: 1989-07-11
•
Expires: 2008-03-25
Abstract
Abstract A method is disclosed for adsorption treatment of a gas which involves moving an adsorbent through a zone to alternately carry out a gas treating step by passing a gas containing a predetermined material such as a harmful organic solvent to be treated through the adsorbent to adsorb the material onto the adsorbent and a regenerating step by passing a regenerating gas at a high temperature through the adsorbent to desorb the adsorbed material from the adsorbent, while feeding the regenerating gas containing the desorbed material to the adsorbent after the gas treating step but before the regenerating step to re-adsorb the material onto the adsorbent before it reaches the regenerating step.
Inventors
- 👤 Soichiro Tsujimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:39
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/06; B01D2253/00; B01D2253/10; B01D2253/102; B01D2257/00; B01D2257/20; B01D2257/206; B01D2257/2064; B01D2257/2066; B01D2257/70; B01D2257/702; B01D2257/7027; B01D2257/704; B01D2259/00; B01D2259/40; B01D2259/40083; B01D2259/40088; B01D2259/4009
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
150 words
A method for adsorption treatment of a gas which comprises: alternately carrying out a gas treating step by passing a gas containing a predetermined material to be treated through an adsorption means to adsorb the material onto said adsorption means, and a regenerating step by passing air as a regenerating gas at a high temperature through said adsorption means to desorb the adsorbed material from said adsorption means; and subjecting said regenerating gas containing the material desorbed from said adsorption means to a re-adsorbing step; said re-adsorbing step being carried out be feeding said gas containing the desorbed material to said adsorption means after said gas treating step but before said regenerating step to adsorb the material onto said adsorption means before said regenerating step; said gas treated in said re-adsorbing step being passed through the adsorption means during said gas treating step together with said gas to be treated.
Claim 2
Independent Claim
150 words
A method for adsorption treatment of a gas which comprises: alternately carrying out a gas treating step by passing a gas containing a predetermined material to be treated through an adsorption means to adsorb the material onto said adsorption means, and a regenerating step by passing air as a regenerating gas at a high temperature through said adsorption means to desorb the adsorbed material from said adsorption means; and subjecting said regenerating gas containing the material desorbed from said adsorption means to a re-adsorbing step; said re-adsorbing step being carried out be feeding said gas containing the desorbed material to said adsorption means after said gas treating step but before said regenerating step to adsorb the material onto said adsorption means before said regenerating step; said gas treated in said re-adsorbing step being passed through the adsorption means during said gas treating step together with said gas to be treated.
Claim 3
Dependent Claim
13 words
A method according to claim 1, wherein the material is an organic solvent.
Claim 4
Dependent Claim
51 words
A method according to claim 1 wherein the adsorption means travels successively through zones for the gas treating step, the re-adsorbing step and the regenerating step, and a part or all of the gas containing the material desorbed from the regenerating step is recycled to the zone for the re-adsorbing step.
References Cited (Backward Citations)
US2114810A
Cited
US2993563A
Cited
US3176446A
Cited
US3455089A
Cited
US3844737A
Cited
US4012206A
Cited
US4259092A
Cited
US4421532A
Cited
US4409006A
Cited
US4440549A
Cited
US4436534A
Cited
US4589892A
Cited
US4516988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-10 | 1993-01-09 | 1993-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-10 | 1997-01-09 | 1997-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-10 | 2001-01-09 | 2001-07-11 | $7700.00 | Window Closed / Lapsed |